Qeoege d



cf. l'30; I 928.v l ,689,278

G D. cRABBs RAILROAD CROSS I NG Filed June 29. 1926 Pafentea oa. so, 192s.

vunirse stares Param*-or-Fica.vv

GEORGE D. CRABBS, CF CINCINNATI. Gl'zi)v A@ wierp ,Appcatiea had June 29. 2328. Serial No. 119,299.

(fl'l'lrl to :rima Heh crossings several times a year and iiiy to replace them by a new crossing itam a year from date of installation.

in my invention 1 have overcome the de- 't'ees in forming crossings and provided a crossing baring many advantages. My crossin@r provides for keeping out moisture, .for insulating; the tracks: provides for reducing or absorbing the n'se vibrations, absorbs all vibrations of track movement Without damage to adjacent portionsof the crossings, which has heretofore been one of the chief causes of trouble, andmy crossing gives many other advantages which will be Yreadily seen by railroad construction and highway engineers. i

In the drawings 1 is a cross section of my invention and Fig'. 2 is'a modification thereof. i

In the drawing 1, 1 are the rails, 2 is the foundation upon which the tracks are to be laid. As shown, this foundation of ronerete, forming a bed the length of the Width of the highway and having vertical sides 3, 3 parallel to the rails 1, 1. 'l'his form of foundation entirely separates the crossing from adjacent portions of the high way, forming separate highway unit crossing. Of course, this is not always necessary to my broad 1nvention and vmay in many instances bedisirwerition relates to railroad highway i-leretofore it has been necessari" pensed with and the rails laid on ties on the.

Ordinary bed. l

As shown in Fig. 1--the ties 4 in this figure shown of Wood are laid in, or on. the foundation. I provide for use if desired a rail cushion especially useful where the rails are laid on concrete or concrete ties but also an advantage With Wood ties` These cushions 5 are preformed from alioinogcncous; mass of bitumen anda filler, for instance asphalt and any fibrousfiller or asphalt rubber and a fibrous filler formed under pressure to the desired form to readily fit under, and preferably extend up and over a portion of.I the rail plate or ba.'-:e.' v These cushions .are resilient and serve to absorb part of the ref tical movement and vibration of the rail. (')n each side of the rail web are placed rail fillers (i. (i. These rail fillersarc preformed by mouldingy under pressure a lhornogife'neous mass of bitumen, a fibrous filler. and if desired a small amountofpulverulent or fine granular mineral filler may be used, but

#nro THE PHILIP CAREY Mmm RAMON or omo.

RCSSIN G.

not sufficient to make the rail iiiler t00 hard. These rail fillers 6, 6 like the cushion 5, absorb vibrationsI of the rail serving` not only'to protect adjacent construction but aise by absorbing the vibrations tends to make the crossing quiet as a train passes over.

Uponthe ties 4 between the rails 1, 1 but parallel to the rails i lay boards or blocbs 7, preferably containing bitumen and a till'er` similar to the rail ilier material referred to, preformed under pressure to form board like slabs or blocks, readily handled and readily applied in position. Upon these boards or `blocks 7, I apply between the rails 1, 1 a wearingsurface ot blocks or slabs 8. These blocks v or slabs 8 forming the wearing ortraliic sur,- face are preferably formed from a homogene-` ous mass of bitumen, a fibrous filler and a quantity of granular or pulverulent minerai matcriah sufficient to provide when formed to desired shape under pressure a relativel l hard form maintaining board, slab or bloei' that will withstand trafiic wear, strains and stresses and will absorb to some extent vibrations, it being preferably harder and more rigid than the raii fillers 6, 6,

As will be seen in' the modification shown in Fig. 2 the separateties are dispensed with and the rails laid on Vthe concrete foundation Q, with the cushion 5 between the rail and Ille foundation.

My crossing, as will be evident from the above, provides `for alisorbin;lr vibrations and movement oi' the rail so that adjacent portions of the highway are protected from damage or deterioration due to movement or Vibration o t the rail. It also provides by reason of the waterproof nature. of the railiillers (3,'6 and the slabs 8, 8 and i', i', protection from detlrrrioration due to ,moisture water. oil. ctr. lt protects the rails from. water and likewise the foundation' upn which the rails aredaid, as well as the ties. By reason of the unit const ruclion ofthe separate parts .su/'li as the tradicsurfziee slabs or boards 8, Sand other parts .otnly crossing. access may be readily obtained to any part of the crossing without damage to 'the surface',` it being apparent that any of the parts may bc readily1 taken up and replaced without daniage. )ly invention provides a crossing composed of slabs .of nonflou'ilfnmlwarpngv Wa" terproof material adapted to absorb trai strains and stresses.

Many modifications and changes can be made without departing from my broad irivention which is a.v railroad crossing haring a traffic surface composed of' preformed unitel of waterproof material und a suitable filler.

l. A track pavement'consistingr of a rail, a rail filler in Contact therewith, and a plurality of independent preformed non-laminated Slabs containing bituminous n'iaterial and a fibrous iller haring the characteristics 'of havinor been formed under pressure into slabs adapted to absorb/'vibrations without frac-ture, adjacentto said rail filler.

2. A track pavement consisting of a rail, a.v rail liller of bituminous material, and :l filler in Contact therewith, and a plurality ot' independent preformed non-laminated slabs containing bituminou material and a brons material adjacent to said filler, Said slabs being relatively hal-'der thanlsaid rail fillers.

3. A railroad crossing consisting ofrails and a traffic surface,said 4surfare composed of a plurality of independent preformed nonlaininate-d units of bituminonj material eon taining a fibrous material haring the charA acteriifztics of having been formed under pres sure into independent slabs.-

4. A railroad,crossingeonsisting of rails and a traffic surface, said :surta: e composed of a. plurality of independent preformed nonlaminated unitsof bituminous material containing a pulvex'ulent mineral material having the characteristics of having been formed under presurc into independent slabs adapted t0 withstand strains and stresses without fracture. n

A railroad crossing consisting' ot' rails and a tx'afiie surface, said surface composed of a plurality of independent preformed nonlaminated units of bituminous material containing fibrous and pulvernlent Amineral niaterial therein harinat the characteristics of having been formed under pressure into independent slabs adapted to withstand strains and stresses without fractur.

(3. A track parement composed ol' a rail. :t rail filler7 in said rail, containing bituminous material, a tratlic'snrl'ace composed of a portion of said rail Iiller and a plurality ot' independent slabs containing bituminous material and a fibrous material having chai'- acteristicsiresulting from having been formed under pressure into slabs adapted to absorb traffic strains and Str'e. se'\I whereby the rail,

the rail filler and the said slabs form a waterproof traffic surface. I

4In testimony whereof, I have signed my name to this specification.

GEORGE D. CRABBS. 

